Quoted from Pin_Guy:Hopefully whoever did this learned that they are not competent to repair these boards and stopped at this one...but I doubt it.
I just fixed two WPC-89 power boards.
For one of them the "repair technician" had replaced BR1, BR2, BR4, C5 and C11. BR2 had a pulled pad and through hole on one of the AC inputs. BR4 had a pulled through hole. Nearby R194 was cooked. Obviously cooked (as in white dust in the center of the body). I don't know how you replace BR4 without seeing the obviously cooked nearby resistor. I assume the resistor cooked because someone erroneously plugged J106 into (most likely) J124 or J128. This is unfortunately more common than you think. 50V (closer to 75V actually) through that 2k resistor for the LED will definitely cook it over time. Dissipated power >= ~2W through a 0.25W resistor.
The worst part about this "repair" was the work was done and was not verified or tested. The board didn't even generate +5V due to the through hole damage to BR2 which affected the trace between BR2 and C5. Such a repair costs more than a normal repair because the damage has to be repaired on top of the original problem that was supposed to have been repaired. I advised the owner of the board to never use that "repair technician" again. The sorriest aspect of the whole thing is exactly described above. The "repair technician" will never see their mistake so they will continue to make it.
Sorry. That was off topic.
Quoted from rockwell:As far as voltages go, I am getting...
J105-5: 0.62VDC
J107-5: 1.53VDC
J107-6: 1.52VDC
Should those all be 20v? Looks like J107-6 should be, at least.
J105 is AC. You should not be measuring DC at this header. J107-5,6 are continuous and should read +20VDC.
If you have +20V at the TP but your above measurements at J107-5,6 then you have a problem on your board. Measure continuity between the points to find the break.
flasher_power.jpg
Green has voltage. Red does not. There has to be a break between the two points. Check continuity with an eye at the orange points. You can also post better images of the front and back of your board as it might be visually evident to someone with good eyes.